I've spent more time than I'd care to admit researching these two challenges, and since there's not a lot of public information on them, I figured I'd write it all down here in case anyone else trying to research comes across this thread. It's a pretty niche thing to collect or really care...
Anyone know of one of these going anywhere lately?
I managed to get one of the Woven Nylon ones on ebay for £80 with a activation locked watch... Managed to sell the watch on ebay for £90 so a deal like this would be good.